Well identified Scott! Hard to tell the exact type (Duplessy 1179,1180, or 1181) Circulated as an (illegal) double sol de Paris, possible mints, Laon, Marseille, Dijon, Riom or Nantes Interesting to note there are two Charles X on French coins, the latter 1824-1830 deliberately chose the title to publicly declare the illegality of your guy's claim to the French throne The early Charles X coins were issued by the Catholic League during the French Wars of Religion, Charles's claim was backed by Phillip II of Spain in opposition to the Protestant Henri IV Henri III (1754 -2.8.1589), Charles X (2.8.1589 - 9.5.1590), Henri IV (2.8.1589 - 1610) Charles spent his entire "reign" as a prisoner of Henri IV see http://en.wikipedia.org/wiki/Charles_de_Bourbon_(cardinal) France's equivalent of our Lady Jane Grey David